From the Calvary Chapel Facebook page:
Please pray for Pastor Chuck Smith, Sr.! Today it was announced cancer has been found in his lung; there is uncertainty as to the extent. We are expecting to know more regarding prognosis and treatment after Tuesday. Please pass on this request of prayer for him, Kay, and the rest of the family.
Link
Let’s pray for Chuck and all the Calvary Chapel folk today. Smith is 83.

According to the Daily Pilot, Chuck Smith, senior pastor of the Calvary Chapel of Costa Mesa and a leading figure of the Jesus People movement in the 1960s, is expected to fully recover after suffering a mild stroke Sunday morning.
On Monday, Smith, 82, of Newport Beach, remained hospitalized indefinitely at Hoag Memorial Hospital Presbyterian.
â€œWe are just so thankful that it was just a mild stroke,â€ said Laura Jackson, his secretary of 11 years. â€œWe are thankful that his recovery is going extremely well and the family is very thankful for the love, the support and prayers from the church and the community…. It means a lot to them.â€
Smith has served as Calvary Chapelâ€™s pastor since 1965. At the time, Smith was a leader of the Jesus People movement in Southern California, saving countless hippies by baptizing them on the beach in Corona del Mar, Jackson said.
SOURCE